Spark plug wire



FIG. 1 is a front perspective view of a spark plug wire in accordance with the new design;

FIG. 2 is a side view thereof;

FIG. 3 is an end view thereof; and,

FIG. 4 is a side view of an alternate embodiment thereof.

The phantom lines shown in FIGS. 1-4 are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design. The broken lines shown in FIGS. 1, 2, and 4 immediately adjacent to the shaded areas illustrate that the spark plug wire is of no particular length.

The drawings are lined for color. 

The ornamental design for a spark plug wire, as shown and described. 